IMS Access Entity Registration for Non-IMS Devices
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Solution Overview
Problem
Non-IMS devices, such as 2G mobile phones and PSTN phones, cannot register with IMS networks, limiting their access to IMS services and incurring higher charges due to reliance on PSTN network elements.
Innovation Solution
Implementing an IMS proxy that performs registration on behalf of non-IMS devices by identifying activity, such as presence status updates or SS7 signaling messages, to associate PSTN identifiers with IP addresses, enabling IMS network registration and service provision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-IMS devices rely on PSTN network elements for call reception, then they can receive calls, but they are limited in service types and incur higher charges
Solution Approach 1:
An IMS access entity acts as an intermediary between non-IMS devices and the IMS network. This entity performs registration on behalf of non-IMS devices by identifying their activity (such as presence status updates or SS7 signaling messages) and communicating their identifiers and IP addresses to the S-CSCF, enabling these devices to access IMS services without native IMS capabilities
Solution Approach 2:
The IMS access entity provides multi-functional service by enabling multiple types of non-IMS devices (2G mobile phones, PSTN phones, black phones) to access the IMS network through a single registration mechanism, making the system universally accessible to various device types
2Adaptability or versatility
If non-IMS devices lack registration signaling capabilities, then they cannot register with the IMS network, but they need access to IMS services
Solution Approach 1:
The IMS access entity serves as a mediator that performs registration operations on behalf of non-IMS devices. It monitors activity from devices lacking registration capabilities, extracts their identifiers and IP addresses, and completes the registration process with the S-CSCF, thereby enabling service access without requiring device-side registration functionality
Solution Approach 2:
The system enables self-service registration by having the IMS access entity automatically identify device activity and perform registration without manual intervention from the non-IMS devices themselves, which lack the signaling capabilities to initiate registration
Data Source
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AI summary
Methods, systems, and computer program products for providing Internet protocol multimedia subsystem (IMS) registration service to a non-IMS subscriber terminal are disclosed. According to one method, activity involving a non-IMS subscriber terminal is identified. In response to identifying the activity involving the non-IMS subscriber terminal, an IMS network registration operation is performed on behalf of the non-IMS subscriber terminal.